This union with Christ, once formed, must be maintained. Christ said, “Abide in Me, and I in you. As the branch cannot bear fruit of itself, except it abide in the vine; no more can ye, except ye abide in Me.” This is no casual touch, no off-and-on connection. The branch becomes a part of the living vine. The communication of life, strength, and fruitfulness from the root to the branches is unobstructed and constant. Separated from the vine, the branch cannot live. No more, said Jesus, can you live apart from Me. The life you have received from Me can be preserved only by continual communion. Without Me you cannot overcome one sin, or resist one temptation.
– The Desire of Ages, pg. 676