Perhaps this is a question that we should ask ourselves more often and then examine our answers – closely!
From an intellectual point of view, one might agree with the premise that there is not anything that is too hard for the Lord. It stands to reason that there is nothing outside the capabilities of the One who created everything in the first place.
The second consideration is our own, personal -inner- response to that question. Like Sarah (the wife of Abraham; Gen 18:1-16) we might take more note of our physical circumstances than the promises of God. Do we tend to measure our expectations of God according to our own understanding, limitations, and capabilities – like Sarah?
There is no doubt that there is nothing too hard for the Lord. Do we wholeheartedly trust him to fulfill what we pray for, or is revealed to us? And, is it also a case of knowing the heart of God, praying according to his will, and trusting Him for the outcome – as may be best for us?
‘The assurance of things hoped for, the conviction of things not seen’ (Heb. 11:1)
And without faith it is impossible to please him, for whoever would draw near to God must believe he exists and that he rewards those who seek him. (Heb. 11:6)
‘And he said to her, “Daughter, your faith has made you well, go in peace and be healed of your disease”. (Mark 5:34)