That way is Jesus Christ. Even though a person might be completely honest and sincere in his belief, if he fails to come by way of the cross, he is lost and without hope. I trust you have come to Him and allowed His cleansing power to make you whole. The Book of Mark parallels and covers much of the same material covered in Matthew, but from a different point of view. So much importance is placed upon this life, and the profit and gain of this world.
Eternity is sure and everlasting.
The man who prepares for the future is a wise man. Christ died that we might have assurance of eternity in heaven. It is the responsibility of every individual to accept Jesus Christ by faith, and receive His free pardon of sin. This is explained so beautifully in John 3.