As I read this passage, it struck me that Hannah’s husband couldn’t understand her and her pain (1 Samuel 1:8-9).
Eli the priest also misunderstood her, actually accusing her of being drunk (13-14).
But God knew her heart. She didn’t even have to speak out loud. He knew her heart. He heard her prayers. And he acted on her behalf (19-20).
People may misunderstand us. People may not understand us at all. But God knows our hearts.
And if we pour out our hearts to him, with words or without, he will hear, and he will act on our behalf.
As Paul says,
In the same way the Spirit also helps us in our weakness, because we do not know what to pray for as we should, but the Spirit himself intercedes for us, with inexpressible groanings.
And he who searches our hearts knows the mind of the Spirit, because he intercedes for the saints according to the will of God. (Romans 8:26-27)
Moment to Moment (Bible blog) 