'Leaning' in the Bible

nor to pay attention to legends (fables, myths) and endless genealogies, which give rise to useless speculation and meaningless arguments rather than advancing God’s program of instruction which is grounded in faith [and requires surrendering the entire self to God in absolute trust and confidence].

keeping your faith [leaning completely on God with absolute trust and confidence in His guidance] and having a good conscience; for some [people] have rejected [their moral compass] and have made a shipwreck of their faith.