He that findeth. He that has found. Note the Introversion in this verse (find, lose; lose, find).
life. soul. See App-110.
loseth. has lost.
for My sake. on account of Me. Luke 14:14; Luke 20:35; Luke 20:36; John 5:29; John 11:25.
find it. In resurrection. Compare 1 Peter 4:19.