Holmes and Watson - why they mean so much to one another
The way I see it, Holmes and Watson are two halves of a whole. This is for many reasons.
First and foremost, they compliment one another personality wise. Where Holmes is seen as cold and calculating, Watson is depicted as warm and welcoming. Holmes can be rather impulsive at times, while Watson has a sort of steadiness and routine to his life, which makes him appreciate his adventures with Holmes further. They’re similar, yet they’re different. They’re both smart, though in different fields and manners, as Watson is more emotionally intelligent and Holmes is more intellectually intelligent. They’re both kind people, despite expressing their care for others and for one another in their own individual manner, where Watson’s way of showing care is more orthodox while Holmes is anything but. Not only do they mean so much to one another, but they also wouldn’t be alive without each other.
Each of them needs the other to live, quite literally.
Of course they would’ve made it if they hadn’t known each other; Holmes would’ve solved a few cases for the police here and there, and he would’ve taken cases from Mycroft, but he would’ve never make a name for himself further than that, since all his writings are very academic and that doesn’t really appeal to the people, and Watson would’ve run a surgery and worked as a doctor. Neither of them would’ve been the characters that we know and love now if they hadn’t met one another.
Additionally, I think that, given the circumstances that both of them were going through at the start of ‘Study of Scarlet’, I don’t think that they would’ve lived as long as they had without one another.
As we’ve seen in most of the Holmes short stories, Holmes doesn’t really care much about his physical, or mental, health. He brushes off injuries, even if they are a bit concerning, and although he would care were he to get severely injured during a case, he wouldn’t mind risking it if it meant finding the solution. He continuously endangers himself and the only person to take care of him afterwards is Watson. Without Watson, I think that it’s not unreasonable or illogical to assume that he would’ve died of some wound infection or an illness that he refused to get treated for.
Although it’s not well-discussed in the books, I would say that Watson definitely helped Holmes to stop his drug addiction and on his road to sobriety. He cares a lot about Holmes’ health and he would always be worried when he’s in one of his ‘dark moods’ that he’s on drugs.
Alongside that, he’s a lot happier with Watson. I don’t think he would’ve admitted to anyone (and I would say that the closest thing to admitting it was when he wrote about Watson leaving him for a wife in ‘The Adventure of the Blanched Soldier’ and how upset he was about that), but he’s always been rather lonely. Having Watson, a companion who tries to understand and help him as much as he could, someone who cares about him, someone who loves him (regardless of the type of love), has made him significantly happier. Watson means so much to him; he’s his ‘Boswell’ and he has refused, on several occasions, to help his clients if it meant that Watson wouldn’t be there (and then they’d relent and let them both handle the case). He's always there with Holmes and he's always there for him, he's his "one fixed point in a changing world" and Holmes would be absolutely distraught (as seen in 'The Adventure of the Three Garridebs', where Holmes was quite distressed about Watson getting hurt).
Furthermore, as I mentioned before, Holmes probably wouldn’t have had his ‘household name’ if it weren’t for Watson’s publications. The people (both fictional and real, but I’m talking about the fictional ones here) enjoyed reading about his adventures and it was through them that they got several clients, who were people that Holmes would’ve never reached if he was on his own.
Watson, on the other hand, desperately needed someone, anyone, to restore his love of life after he came back from Afghanistan. He came back a “broken man”, essentially. He hadn’t had any close friends, any relatives, anyone really, and he was completely and utterly alone in London. He needed someone to, for a lack of a better word, “cure” this loneliness that he’s faced after the war. Holmes was that “cure”. He gave him a “purpose” in life; a “raison d’etre”. He allowed him to help people. He gave him the opportunity to go on adventures, do things that he would’ve possibly never imagined doing, and provided him with excitement, leading him to love life and living again. He helped Watson become who he really is, and not the shell of a human being that he (understandably) was after returning from the war.
They both complete one another, and they’re sort of two halves of a whole. If I were to be a bit poetic, I’d say that they’re the sun to one another’s moon. They both provide the other with light, in different manners, and they both conduct it to the other. They wouldn’t be who they are without one another, very simply. I think the best way to conclude this is to quote The Crane Wives’ ‘The Moon Will Sing’, “I shine only with the light you gave me” is a very accurate descriptor for Holmes’ and Watson’s relationship with one another.
