Enoch sought for purity of heart for 300 years (see Patriarchs and Prophets, 87). At the end of that period the Lord translated him and took him to heaven. He still lives there today, approximately 5000 years later. It is only the pure in heart who will see God (Matthew 5:8) and be taken to heaven at the end of the world. The trouble is that you and I do not have 300 years to seek for purity of heart. What are we to do in our short lifetime?
The Apostle Paul wrote to Titus that Jesus gave Himself for us, that He might redeem us from all lawlessness, and purify unto Himself His own special people, zealous of good works (Titus 2:14).
“Our only hope is perfect trust in the blood of Him who can save to the uttermost all that come unto God by Him. The death of Christ on the cross of Calvary is our only hope in this world, and it will be our theme in the world to come. Oh, we do not comprehend the value of the atonement! If we did, we would talk more about it. The gift of God in His beloved Son was the expression of an incomprehensible love. It was the utmost that God could do to preserve the honor of His law, and still save the transgressor.” Our High Calling, 45.
“Before the cross the sinner sees his unlikeness of character to Christ. He sees the terrible consequences of transgression; he hates the sin that he has practiced, and he lays hold upon Jesus by living faith. He has judged his position of uncleanness in the light of the presence of God and the heavenly Intelligence. He has measured it by the standard of the cross. He has weighed it in the balances of the sanctuary. The purity of Christ has revealed to him his own impurity in its odious colors. He turns from the defiling sin; he looks to Jesus and lives.
“He finds an all-absorbing, commanding, attractive character in Jesus Christ, the One who died to deliver him from the deformity of sin, and with quivering lip and tearful eye he declares, ‘He shall not have died for me in vain. Thy gentleness hath made me great’ (Psalm 18:35).” Manuscript Releases, vol. 4, 120, 121.