"When Christ, who is our life, shall appear, then shall ye also appear with him in glory." (Colossians 3:4).
If we ask what is the very essence and heart of Christianity and the Christian life, the answer is that God has summed up and centered all things in the person of His Son, Jesus Christ. This means that Christianity is not a number of things as in themselves, such as beliefs, doctrines, dogmas, practices, forms, rites, orders, or virtues. It is not salvation, regeneration, sanctification, power, life, joy, peace, etc, as things; it is just Himself, and Himself as resident within those who have received Him as Who and What He is. He is the total of all that is necessary for God's glory and satisfaction, for which we were created. Nothing can be had or known as an "it", apart from the Person. If we have Him and live by Him, we have all.
Failure to realize this inclusive fact in a living way is the reason for every kind of weakness, failure, and disappointment, both in life and in service. We may be craving for or striving after an "it", whatever that "it" may be, but God will never depart from His position in relation to His Son. Many people have striven with such soul intensity after an it as to have become psychic or occult, and they have got an "it"; but it is not from God, and the end will prove that to be so.
Christ Our Life (1940)by T. Austin-Sparks