From our small perspective, coincidences exist.
He said conscience, not coincidence.
Conscience can be likened to the voice of God, warning the sinner of impending punishment:
For whereas wickedness is fearful, it beareth witness of its condemnation: for a troubled conscience always forecasteth grievous things.
Conscience is a measuring stick against which we may judge ourselves and gain some insight as to the state of our own soul (though we cannot know this with absolute certainty)
Riches are good to him that hath no sin in his conscience: and poverty is very wicked in the mouth of the ungodly.
In our conscience we may know whether or not we are keeping Christ's commands of loving God above all things, and loving each other as He has loved us.
And herein do I endeavour to have always a conscience without offence toward God, and towards men.
But in reality, everything is controlled by God.
No. Human beings have free will. God does not control or ordain what they will choose, but foresees it and ordains the reward or punishment, which is due.
He is just as aware of your thoughts at this moment as He is of two microscopic dust particles colliding into each other 500,000 light years away in space in the year 1407.
This much is true.