You are never too old to set another goal or to dream a new dream.

恐惧常常是我们最大不幸的根源。

When making something， always get a few extras — extra material， extra parts， extra space， extra finishes. The extras serve as backups for mistakes， reduce stress， and fill your inventory for the future. They are the cheapest insurance.

I don't like to do easy things. I like to do things that are challenging and that push me.

The most important single aspect of software development is to be clear about what you are trying to build.

最好的领导方式是倾听。