He is the one who I feel and beleive in, you can know that He's God through many ways, simply praying from your heart to clarify His identity to you if he is real.
Or study the prophecies mentioned about him hundreds of years before his born, and his followers would never have been able to change all these jewish prophecies and to just make this undocumented story of not being died on the cross and take his body alive from the WELL secured roman grave. Anyway, after all these years, millions of ppl around the world now can prove to you He is alive and true as He is living with them in their daily lives, and we are not hallucinating.