Failure has gone to his head.
A fellow who is always declaring that he's no fool, usually has his suspicions.
God help those who do not help themselves.
Most hard-boiled people are half-baked.
A slave has but one master. An ambition man, has as many as there are people who helped him get his fortune.
If you steal from one author it's plagiarism; if you steal from many it's research.