Titus 1:16

‘They profess that they know God, but by their works they deny him, being abominable, and disobedient, and unto every good work reprobate.’

These people profess that they know God (they have a form of godliness - 2 Timothy 3:5) but by their works they deny Him. They do not let their light shine before men so that they may see their good works and glorify their Father who is in Heaven (Matthew 5:16). Rather they are abominable (loathsome, to the Jews it was a word connected with idolatry, and therefore indicated shame) for they spoil all that they come in contact with. And they are disobedient, disobedient to the Gospel, and disobedient to the command to love their neighbours as themselves, for their ears are closed to God. ‘And to every good work rejected after testing (adokimos).’ None of their supposed good works measure up to God’s requirements (compare Matthew 6:1-18). It is clear that their knowledge of God, such as it is, makes little difference to their manner of life. Paul clearly considers that any genuine Christian will become totally different in attitude when he or she is converted.

Adokimos is a Pauline concept (five times in Paul outside the Pastorals, including e.g. Romans 1:28; 1 Corinthians 9:27; once in 2 Timothy 3:8 and once in Hebrews 6:8).