Passage
And Peter began to say to him, `Lo, we left all, and we followed thee.'
And Peter began to say to him, `Lo, we left all, and we followed thee.'
Mark 10:26 And they were astonished beyond measure, saying unto themselves, `And who is able to be saved?'
Mark 10:27 And Jesus, having looked upon them, saith, `With men it is impossible, but not with God; for all things are possible with God.'
Mark 10:28 And Peter began to say to him, `Lo, we left all, and we followed thee.'
Mark 10:29 And Jesus answering said, `Verily I say to you, there is no one who left house, or brothers, or sisters, or father, or mother, or wife, or children, or fields, for my sake, and for the good news',
Mark 10:30 who may not receive an hundredfold now in this time, houses, and brothers, and sisters, and mothers, and children, and fields, with persecutions, and in the age that is coming, life age-during;
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 "And Jesus having looked upon them saith..." into verse 29's "And Jesus answering said Verily I say...", 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.