If I am not for myself then who will be for me? and if I am only for myself then what am I? and If not now when? What does this mean

Bro this explination is gonna sound wack but trsut me it will make sense

Explanation:

This means that we have to look at ourselves and evaluate how we are living our lives. I also think it is making you take responsibility for yourself. Also that we shouldn't lean on others to be us and take care of us.

It means to be yourself you have to act like someone else at times but when at least tats how I interpret it