There is nothing in life that surpasses the glory of gaining Jesus!
Think about this – There are those who are married and there are those who love to be married to the person they love. This drives them to constant learning and growing in love and intimacy. There is great joy in doing so.
Similarly – There are those who are saved and there are those who love their Savior more than life itself. They savor and enjoy Him forever. They learn of Him daily and drink of all he is, both in His Word and in fellowship with the Spirit.
True gain is growing in the knowledge of your Lord and Savior, savoring and seeking diligently with persevering faith to know Him more every day.