'Within' in the Bible

Now while Peter was greatly perplexed within himself [as to] what the vision that he had seen might be, behold, the men who had been sent by Cornelius, having found the house of Simon by asking around, stood at the gate.

Now while Paul was waiting for them in Athens, his spirit was provoked within him [when he] observed the city was full of idols.

And we sailed away from Philippi after the days of Unleavened Bread and came to them at Troas within five days, where we stayed seven days.