It’s Love.

Fear is based on the lack of love. Jesus’ effectiveness came because He lived in the  "bosom of the Father" (John 1:18) —a picture of divine warmth and love.

"Perfect love casts out fear" (1 John 4:18) . This means recognizing that God loves you perfectly. You are made "accepted in the beloved", which uses the Greek word χαριτόω (charitoo), meaning highly favoured.

Stop trying to love God perfectly; realize He loves you perfectly