Passage
Peter began to say unto him, Lo, we have left all, and have followed thee.
Peter began to say unto him, Lo, we have left all, and have followed thee.
Mark 10:26 And they were astonished exceedingly, saying unto him, Then who can be saved?
Mark 10:27 Jesus looking upon them saith, With men it is impossible, but not with God: for all things are possible with God.
Mark 10:28 Peter began to say unto him, Lo, we have left all, and have followed thee.
Mark 10:29 Jesus said, Verily I say unto you, There is no man that hath left house, or brethren, or sisters, or mother, or father, or children, or lands, for my sake, and for the gospel`s sake,
Mark 10:30 but he shall receive a hundredfold now in this time, houses, and brethren, and sisters, and mothers, and children, and lands, with persecutions; and in the world to come eternal life.
The verse centers on "peter", "began", "left", "followed", and "thee". It is saying that the verse draws attention to "peter" and "began", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 27's "Jesus looking upon them saith With men..." into verse 29's "Jesus said Verily I say unto you...", so "peter" and "began" belong inside that flow. In Mark context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "peter" and "began" with trust shaped by these words, not by a vague optimism outside the passage.