The temptation to “lose steam” in our lifelong responsibility to reverence God in every aspect of our lives, to become lazy and complacent in our pursuit of what is “good, well pleasing to God, and perfect,” is a natural one—but it must be strenuously resisted... The encouragement to be “set on fire by the Spirit” is, as church history and current experience amply attest, open to abuse. Christians have often been so carried away by enthusiasm for spiritual things that they have left behind those objective standards of Christian living that the Scriptures set forth.
(Prof. Douglas Moo)

     Here is a way to rouse yourself when you are feeling slack, feeling you have no energy, and doubting whether you will read your Bible, whether you will pray, or whether you will go to God’s house to study the Scriptures, or to worship Him and sing His praises. When you feel like that, remember what you are called to.
(Dr. Martyn Lloyd-Jones)

     We must not judge of God’s works by our own feelings, nor measure them by present results. For often He is at work where we see nothing, and accomplishing much where we think nothing is happening. Therefore, let us learn to persevere in obedience, even when no fruit appears before our eyes.
(John Calvin)