Jesus’ words and deeds on the night of the Last Supper were focused on helping the disciples grasp a truth as revolutionary as the first use of an incandescent light. “On that day you will realize that I am in my Father, and you are in me, and I am in you” (John 14:20).

In a sense, we’re a light-bulb—an airtight glass housing a tungsten filament. When the bulb is connected to a power supply, the electric current zips through the tungsten, releasing light photons.

A light-bulb can’t fulfill its intended purpose without electricity. When the power goes out, the light-bulbs in your fixtures and lamps generate no more light than an empty glass jar. The moment the power returns, the bulb glows.

Similarly, our body is the glass bulb and our spirit the filament. The moment we trust in Jesus as our Savior, God’s Spirit acts like an electric current touching the filament of our spirit, and suddenly we’re able to fulfill our God-given purpose.

Unlike the unreliable power source on which a light bulb depends, the Holy Spirit indwells us with an inexhaustible and unbreakable energy supply—the same resource Jesus drew upon during his life on earth. No wonder the Lord said, “He who believes in Me, the works that I do, he will do also; and greater works than these he will do; because I go to the Father.” Jesus may be with the Father, but the Holy Spirit is with us providing the unlimited power Jesus utilized.