By God's efforts, of course!!! NOBODY comes to Jesus unless Father God DRAWS THEM TO HIM. (John 6:44)
Jesus said those words in reference to the Jews who were trying to achieve their salvation by means of following a works system.,
Up until then they had been doing works invented by the Pharisees.
Jesus was setting the record straight by telling His disciples the true means to gaining salvation.
"Instead of seeking works to do in order to become saved? ...
One must let God bring you to place where you can be saved. "
Jesus was shooting down the notion that doing works will save you.
That 'religious' mob that left and followed him no more? (john 6:66)
They had been seeking from"rabbi" Jesus to do the same thing as the Pharisees had brainwashed them into thinking.
To have "Rabbi" Jesus tell them what new works they were to do to inherit eternal life.
And Jesus gave them a true work! One they could not handle...
"Eat my flesh and drink my blood."
Jesus was giving them a preview of what was to happen with those who believed after He finished his work on the Cross!
Sure does not sound like Jesus was into trying to win a popularity contest...
grace and peace .................