In a world so broken and led by fear, most people are afraid to give their hearts to anything because fear has gripped us. When you remember that God is love and He is perfect love, you realize that loving and being loved by Him is something you want in all its fullness. And there really is no fear then in giving him everything, as Moses says to love God with all our heart, all our mind and all our soul truly is the greatest commandment.
Remember there is freedom in perfect love. The freedom to be who we truly are, completely.