Matthew 16:24 (AMP)
Then Jesus said to His disciples, If anyone desires to be My disciple, let him deny himself [disregard, lose sight of, and forget himself and his own interests] and take up his cross and follow Me [cleave steadfastly to Me, conform wholly to My example in living and, if need be, in dying, also].
Mark 8:34-35 (AMP)
And Jesus called [to Him] the throng with His disciples and said to them, If anyone intends to come after Me, let him deny himself [forget, ignore, disown, and lose sight of himself and his own interests] and take up his cross, and [joining Me as a disciple and siding with My party] follow with Me [continually, cleaving steadfastly to Me]. For whoever wants to save his [higher, spiritual, eternal] life, will lose it [the lower, natural, temporal life which is lived only on earth]; and whoever gives up his life [which is lived only on earth] for My sake and the Gospel’s will save it [his higher, spiritual life in the eternal kingdom of God].