A reason to be glad no human came along, I thought.

The reason for his thought came slowly out of the picture.

The reason I think so comes from the first time we were fed.

"Well, that's all the more reason to turn it off and come to bed."

Now the reason for the good lighting in here came to him.

"Very good reasons as it turns out but one will come to those in due course."

Now the reason for her being in his cabin came back to him with force.

No reason to think they would have come back, was there?

Sometimes it took years or decades before the reasons came clear.

Once they were out in the hall, his reason came clear.