And being not weak in faith - That is, having strong faith.
He considered not - He did not regard the fact that his body was now dead, as any obstacle to the fulfillment of the promise. He did not suffer that fact to influence him, or to produce any doubt about the fulfillment. Faith looks to the strength of God, not to second causes, or to difficulties that may appear formidable to man.
Now dead - Aged; dead as to the purpose under consideration; compare Hebrews 11:12, “As good as dead.” That is, he was now at an age when it was highly improbable that he would have any children; compare Genesis 17:17.
Deadness ... - Hebrews 11:11, “When she was past age;” compare Genesis 18:11.