There is nothing more dangerous to a man than pride. And the Word of God addresses pride and the dangers throughout his word. God resists the proud ( James 4:6, 1 Peter 5:5) and is the first mention in Proverbs 6:16-19 of seven things God hates ( a proud look).
When man comes to believe that the skill within his hands and the knowledge in his mind is from his own self instead of being God given, he falls into a dangerous place with God. Man has no skill or wisdom of his own, it all comes from God and failing to give God praise and glory for whatever wisdom & skill God has blessed him with is indeed a huge FAIL. Man must be careful not to cross the line between being satisfied for doing a job well done ( work as unto the Lord Colossians 3:23-24) and having a good feeling about it, or stepping back and saying 'look what I have done. Whether it be at the forge, grinder, finishing table or a day job.