sentences:  During his early service with Starfleet, Tuvok became increasingly uncomfortable associating with non-Vulcans, and he resigned his Starfleet commission in 2298 to pursue his people's Kolinahr regimen of true non-emotion.Tuvok aborted his study of Kolinahr when he went into pon farr six years later, leading to his marriage to T'Pel.Fifty years later, after much self-examination, Tuvok rejoined Starfleet as a training instructor at Starfleet Academy.