Every person have a role to play in their life, even a yogi can't survive without fulfill it!Most of them think that they want to leave everything 4practice! You don't need to leave anything &you don't need to gain anything. Everything is here in with you, so just play the role.
Each bite of knowledge taking us one step ahead in the path of life. It's not going to stop us from the end; but it can reduce the pain in life what it going through. Every philosophy and science created on the base of it only. And I am pretty sure that it will remain like that till the life goes in this universe.