Material achievements are like play toys.

"They are modelled after real things. but they are just imitations. A little girl may spend hours imagining that her doll house is real, but it is still a toy all the time. Krishna has impregnated this material world with spiritual sparks, ourselves. And we are little children playing with toys, and Krishna is a kind father allowing us to play to our hearts' content. The material body comes into being, and it grows, leaves some by-prodycts, gets older, dwindles and vanishes. And this process is repeated over and over. But to avoid all this suffering, we must return to Krishna, to reality. Illusion is always strong and is saying, 'Look here! Enjoy. You are God! Why do you worship.?'

We are in the reflection and are being baffled. There is a saying, 'I thought I was building my cottage safely, but it was burnt to ashes.' Whatever we do here is patchwork. Where can you get happiness? Whatever material thing you will get will eventually vanish. So this sense of temporary nature of things should come to us.."

- Srila Prabhupada (Hare Krishna Explosion Ch6 Pg 114)