The heart is deceptive and man is unable to truly see into his heart without help. Yet, there is hope that man can be given sight by the Father of lights.
Apart from God's grace, man is unable to rightly see or understand his own heart.
It is in God alone that we can know our heart, humbly ask for him to provide "a broken and contrite heart" (Psalm 51:17), and faithfully stand up in confidence that he will follow through on his promises.
Success does not only have to be overcoming, but it can be taking a small step one day in believing in my true Comforter, and giving myself grace just as he does. That is what it is about, not being alone.
Although you have been marred by the effects of sin and separated from His love, it is through faith in His Son that you can be reunited in grace with Him.