Thanks again to Padmapani Prabhu at The Prabhupada Connection for compiling this nice list of quotes on accepting the authorized plan for happiness.
“So far your thinking about things and making so many plans, that is all right, but our first business is Krishna’s plan. That is the only plan, and no matter how many schemes we employ to adjust things in this material world, if they have no solid basis in Krishna’s plan, they remain merely dreams of phantasmagoria. So in this Krishna Consciousness Movement, I am training boys and girls all over the world how to act nicely by practically serving Krishna in their everyday lives. That is more important than trying for something which I may like to do but which will never happen.” (Srila Prabhupada Letter, April 10, 1972)
“Our plan should be to accept Krishna’s plan, that’s all. Approved, authorized plan. That is very easy. Take any words of Krishna, it is very easy.” (Srila Prabhupada Morning Walk, Tehran, August 12, 1976)
“If you follow Krishna’s instruction, you’ll always be happy. And if you create your own plans, then you’ll be unhappy. This is the whole instruction. Sarva-dharman parityajya mam ekam saranam vraja: (BG 18.66) ‘You give up your own plans, nonsense plan. You take My plan. You’ll be happy.’ This is the whole purpose of Bhagavad-gita. You take Krishna’s plan and you’ll be happy.” (Srila Prabhupada Conversation, April 22, 1976, Melbourne)
The Hare Krishna Movement 