If we allow ourselves

My heart is steadfast, O God, my heart is steadfast! (Psalm 57:7 ESV)

 The Lord says He’ll keep us in perfect peace if our mind is focused on Him and we set our affections on things above. If our mind is focused on Him, our heart is steadfast on Him, and our affections are set on things above, then we’re going to be firmly connected to Him in spite of the real obstacles, trials of our faith, and seemingly insurmountable challenges we may face.
 It is possible to live above worry and fear and discouragement! Of course, you’re still going to be tempted to worry or fear, but as long as you’re fighting it in your spirit and mind, and asking the Lord for His perfect peace to fill your heart and mind, you’re bound to overcome it.
 As Christians, we are not supposed to operate according to our feelings; we are supposed to operate by fact—faith in the facts according to God’s Word. We walk by faith and not by sight, or by feelings. So when you are besieged with negative feelings of any kind, you have to take a stand of faith and overpower them with God’s Word.
 If we allow ourselves to become overwhelmed with discouragement or worry or anxiety, we miss the offer of the Lord’s mercy, help, faith, and grace. —Maria Fontaine [1]

 God's mercy is so great that you may sooner drain the sea of its water, or deprive the sun of its light, or make space too narrow, than diminish the great mercy of God. —Charles Spurgeon

[1] Anchor Transformational Power