Contradiction with Philippians 4:13
This verse states that strength comes through Christ, whereas Psalms 59:9 emphasizes waiting on God's strength alone.
Philippians 4:13: I can do all things through Christ which strengtheneth me.
According to David, he trusts and waits for God because God is strong and keeps him safe like a high tower. David feels protected because he believes God is always there to look after him.
Psalms 59:9: [Because of] his strength will I wait upon thee: for God [is] my defence. [defence: Heb. high place]
This verse states that strength comes through Christ, whereas Psalms 59:9 emphasizes waiting on God's strength alone.
Philippians 4:13: I can do all things through Christ which strengtheneth me.