You can't know too much, but you can say too much.

I have found it advisable not to give too much heed to what people say when I am trying to accomplish something of consequence. Invariably they proclaim it can't be done. I deem that the very best time to make the effort.

Talk low, talk slow and don't say too much.

Know not to revere human things too much.

You can't get too much winter in the winter.

If you don't think too good, don't think too much.