Authors:

Young men are apt to think themselves wise enough, as drunken men are apt to think themselves sober enough.

Lord Philip Dormer Stanhope Chesterfield, Philip Dormer Stanhope Earl of Chesterfield (1855). “The Works of Lord Chesterfield: Including His Letters to His Son, Etc : to which is Prefixed, an Original Life of the Author”, p.498
Young men are apt to think themselves wise enough, as drunken men are apt to think themselves sober enough.