A man always has two reasons for what he does-a good one and the real one.

If you have to ask, you can't afford it!

If you have to ask how much it costs, you can't afford it.

A man always has two reasons for doing anything / a good reason and the real reason.

Go as far as you can see; when you get there, you'll be able to see farther.

The wise man bridges the gap by laying out the path by means of which he can get from where he is to where he wants to go.