Temptation has a new name

Opportunity knocks but only once, but temptation knocks on your door for years - Unknown

It is probable that the people who aspire for perfection never felt much temptation to be human beings - altered version of a George Orwell quote

I generally avoid temptation unless I can resist it - Mae West

There are several good protections against temptation, but the surest is cowardice -Mark Twain