No-one could possibly live their entire lives in accordance with Jesus’ exacting and impractical commands, loving their enemies, turning the other cheek, giving to all who ask. It can’t be done, which is why no-one, but no-one, manages it.
There’s a reason his expectations are so ridiculously unrealistic. Jesus didn’t anticipate that people would have to live according to them for very long. He fully expected that within a very short time, God would be imposing his kingdom rule on the Earth (Mark 1:15; Matthew 4:17; 10: 5-23; 16:28; 24:34 etc). The old system was about to pass away and the new golden age of the Kingdom of Heaven was just about to make its spectacular appearance. This was Jesus’s good news: if his fellow Jews changed their behaviour in the way he commanded, they could earn a place in the Kingdom (Mark 9:35; 19:47, Matthew 25:34-40; 31:36; 20:27-28 etc) Sacrificially serving others, putting oneself last, going the extra mile, all of it, was a small, short-term price to pay for eternal life in a renewed Earth from which all evil had been eradicated.
Of course, it didn’t happen. The Son of Man did not descend from the clouds within the disciples’ lifetime to make Earth as it is in Heaven (Matthew 6:10). As the first century progressed it was obvious that Jesus’s prediction of ‘thy Kingdom come’ hadn’t happened in the time scale he (and Paul) had anticipated. Consequently, his good news had to be adjusted*. We see this in Luke’s gospel, which starts to speak of the kingdom as an inner, spiritual experience, and in the fourth gospel where the coming kingdom is eliminated entirely. By the time of 2 Peter, its non-appearance has become the nonsensical argument that the then one hundred year delay was so that God could give people more time to repent.
All the same, the new cult’s members were now stuck with Jesus’s unreasonable commands. They’d been codified in the stories about him that were by then doing the rounds. (I’m of the view that the various sects within the cult created the commands themselves, as short term rules while they waited for the Great Reset.) As a result, the words put in Jesus’s mouth went from being instructions for the time at hand to impossible demands for the long haul. Two thousand years later and they’re still there. So how do most Christians deal with them? By ignoring them, dismissing them, insisting Jesus didn’t mean them literally, which of course he, or his scriptwriters, most certainly did.
The early cultists, believing an angelic figure would soon be descending from heaven to kick start God’s Kingdom on Earth, were wrong. Just about as wrong as it is possible to be. The writing they left behind, the so-called New Testament, is testimony to the failure of their beliefs.