'Unable' in the Bible
“You have heard that it was said to the men of old, ‘You shall not murder,’ and ‘Whoever murders shall be guilty before the court.’
But I say to you that everyone who continues to be angry with his brother or harbors malice against him shall be guilty before the court; and whoever speaks [contemptuously and insultingly] to his brother, ‘Raca (You empty-headed idiot)!’ shall be guilty before the supreme court (Sanhedrin); and whoever says, ‘You fool!’ shall be in danger of the fiery hell.
And He said, “Are you still so dull [and unable to put things together]?
And He came to the disciples and found them sleeping, and said to Peter, “So, you men could not stay awake and keep watch with Me for one hour?
In the same way the chief priests also, along with the scribes, were ridiculing and mocking Him among themselves and saying, “He saved others [from death]; He cannot save Himself!
But when he did come out, he was unable to speak to them. They realized that he had seen a vision in the temple; and he kept making signs to them, and remained mute.
And there was a woman who for eighteen years had had an illness caused by a spirit (demon). She was bent double, and could not straighten up at all.
And another said, ‘I have [recently] married a wife, and for that reason I am unable to come.’
Otherwise, when he has laid a foundation and is unable to finish [the building], all who see it will begin to ridicule him,
for I will give you [skillful] words and wisdom which none of your opponents will be able to resist or refute.
Why do you misunderstand what I am saying? It is because [your spiritual ears are deaf and] you are unable to hear [the truth of] My word.
Jesus said to them, “If you were blind [to spiritual things], you would have no sin [and would not be blamed for your unbelief]; but since you claim to have [spiritual] sight, [you have no excuse so] your sin and guilt remain.
Therefore they could not believe, for Isaiah said again,
The men who were traveling with him [were terrified and] stood speechless, hearing the voice but seeing no one.
And he was unable to see for three days, and he neither ate nor drank.
Now, watch! The hand of the Lord is on you, and you will be blind, [so blind that you will be] unable to see the sun for a time.” Immediately a mist and darkness fell upon him, and he groped around, seeking people to lead him by the hand.
and when the ship was caught in it and could not head against the wind [to gain stability], we gave up and [letting her drift] were driven along.
However, brothers and sisters, I could not talk to you as to spiritual people, but [only] as to worldly people [dominated by human nature], mere infants [in the new life] in Christ!
We are pressured in every way [hedged in], but not crushed; perplexed [unsure of finding a way out], but not driven to despair;
For we do not have a High Priest who is unable to sympathize and understand our weaknesses and temptations, but One who has been tempted [knowing exactly how it feels to be human] in every respect as we are, yet without [committing any] sin.