I don't want to get too lost in the technical weeds on this text, which would be easy to do, since there is a great debate among top Greek scholars about how to understand the «time» of present participles in Greek. (redeeminggod.com)
In John 3:18, for example, John quotes Jesus as saying, «He who believes [present participle] in Him is not condemned [perfect tense verb].» (redeeminggod.com)
John writes that «he who does not believe [present participle] God has made Him a liar [perfect tense].» (redeeminggod.com)