The vehicle which takes us to that destination is called prayer. When you think about it, that's pretty disappointing. Paul thought teaching his young churches how to pray was so important that he not only peppered his epistles with exhortations to pray without ceasing, pray always with thanksgiving, etc. Very few Bible and theological colleges have taught their students how to pray. There are retreats for prayer and meditation, hundreds of books are being written about spiritual formation and spiritual direction, people are getting together in small groups for communal prayer, and more seminaries and colleges are teaching in this area.
Prayer is hard work.
Prayer is a gift from God. It's not a bag of spiritual techniques. Prayer is not just what I do, but what God wants to do through me. There are three kinds of prayer. As their prayer deepends, many of the saints find themselves praying longer, but with fewer words.