God, a Transcendental Person
The personhood of Krishna is not an idea invented by human beings naively creating a God in their own image. Nor is personhood a limiting concept when applied to God, or the Absolute Truth. As the source of everything, Krishna naturally has His own personal identity, just as each of us does. The Vedas define God as the one supreme conscious being among all other conscious beings. He is infinite, we are finite, and He maintains us all.
Naturally, the best way to understand God is to learn from Him. In the Bhagavad-gita ("The Song of God"), Lord Krishna—a real, transcendental person—tells us that He is God and reveals many things about Himself.
"Unintelligent men, who do not know Me perfectly, think that I, the Supreme Personality of Godhead, Krishna, was impersonal before and have now assumed this personality. Due to their small fund of knowledge, they do not know My higher nature, which is imperishable and supreme."—Sri Krishna, Bhagavad-gita 7.24