God: "I looked for someone to take a stand for me, and stand in the gap" (Ezekiel 22:30)
Yes, our deeds of mercy is a platform to help people believe the Gospel, but that is not the primary reason for mercy. Mercy is ultimately a natural expression from those who already believe the Gospel.
'Trust in the Lord with all your heart and lean not on your own understanding' - Proverbs 3:5. This quote teaches us to rely on God's wisdom and guidance rather than our own limited understanding.