Spiritual exhaustion comes from leaving the Holy Spirit out of your daily life. Prayer, Scripture, and attentiveness to the Spirit aren't luxuries you skip when busy, they're what actually gives you strength to handle it.
Chapters
The real reason you feel spiritually drained is because you're not involving the Holy Spirit in your life. You're shutting him out without even realizing it. The truth is that you can accomplish more in a Spirit-led day than you can in a self-reliant year. I know that when you feel busy and overwhelmed, it can feel like you don't have time to pray or read the Word. But what feels like a shortcut is actually a spiritual setback. If anything, the busier you are, the more responsibility you carry, the more you should pray. Involve the Holy Spirit in your daily life through committing to prayer, devotion to God's Word, and an attentiveness to the Holy Spirit that helps you to rise above distraction. If you're feeling constantly drained, it's because you're giving from the wrong source. Rely on the Holy Spirit, and you exchange your weakness for his unlimited strength.