The only responsibility of man is to accept God‘s sovereignty. That is the solution of a problem debated for eternity. It is, in a word, obedience--which is itself, in a word, love.
Man has responsibility. This is not an option. It’s a condition of life. The ability of response is, almost by definition, life, and therefore man. If light is shown upon a rock in utter darkness and the rock responds by staying put, then it is indeed a rock and not alive, or, at least, only as alive as an unresponsive rock can be. But if light is shown upon a rock and the rock responds by scurrying away, then we say “Whoah, that is no rock! That thing is alive!”
Because he is alive, man has the ability of response. Because he is responsible, he is alive. But alive for what? Responsible to what? As with our rock, to a light in the darkness.
In the kingdom of heaven there is a king, and everyone in that kingdom is singing in one accord. But it is not one voice, it is one million voices in one, and it is not a machine of music, it is definitely alive. All the pictures and images in the Bible that even begin to touch on something like the heavenly realm are filled with Ezekiel’s rainbows and beasts with four heads and six wings with one thousand eyes and colors and forms and row after endless row of bowing or shouting holy people, a circus of angels circling around a central throne in a ring of fire. It is literally almost anything but a uniform thing; almost anything but a bland, grid-like uniformity praising the sovereignty of a despotic or deterministic slave master. And what glorifies the heavenly king is that all those voices and all those forms are saying something like “I have chosen to abdicate my throne of choice!” or “I have finally fulfilled my one responsibility” or “I have chosen This King over all the others.” Therefore man’s responsibility to choose God’s sovereignty glorifies God greater than Sovereignty alone. In a sense it is a double glorification, even a seventy times seven multiplication of the glory of the king.
Christ himself is the unification of the idea of man’s responsibility and God’s sovereignty. That is who Christ is. As man is to all other creatures, so Christ is to all other men. He is the singular and outstanding culmination of something that pierced existence. He is the point of Abraham‘s knife at the down stroke.
Where the story of Abraham left off, is where God Himself cried, “It is finished!” At that place, on that mountain of God’s Providence, Christ was obedient unto death; even death on a cross. He sacrificed choice by choice.