By failing to prepare, you are preparing to fail.
There's small Revenge in Words, but Words may be greatly revenged
A child thinks 20 shillings and 20 years can never be spent.
When you're testing to see how deep water is, never use two feet.
For having lived long, I have experienced many instances of being obliged, by better information or fuller consideration, to change opinions, even on important subjects, which I once thought right but found to be otherwise.
Cunning proceeds from want of capacity.