WHY HAS IT BECOME IMPOSSIBLE TO DO THE LAW- Mark 10:27?

You were told that it’s impossible to do the law, yet in the bible, everyone could see and read it clearly (Mark 10:27) that: “WITH GOD ALL THINGS ARE POSSIBLE”, why is obeying the law not possible in this case? Or, is it only in our ‘WANTS and ‘DESIRES’ that we exercise that faith? I mean, is it not same personality that said both? Or did it become impossible out of our own INSINCERITY, or do you no longer believe in that “GOD”; I mean with faith? Or is it impossible for “GOD” to do? Or has the “GOD” changed his mind from what he once said? Tell me why it has become impossible for you to do/obey the law, well, I presume it’s out of our LARGE SUM OF INSINCERITY or ‘is the ‘GOD’ dead’?obeying Torah