Therefore, since through God's mercy we have this ministry, we do not lose heart.
NIV
THEREFORE, SINCE we do hold and engage in this ministry by the mercy of God [granting us favor, benefits, opportunities, and especially salvation], we do not get discouraged (spiritless and despondent with fear) or become faint with weariness and exhaustion.
AMP
Therefore seeing we have this ministry, as we have received mercy, we faint not;
KJV