Mother to son by Langston Hughes

By using the metaphor of the staircase, Hughes alludes to Jacob's Ladder. The Mother character is on a difficult and arduous uphill journey, hoping that if she endures her struggles she can eventually ascend to the highest "Promised Land." Biblical imagery was quite common in autobiographical accounts of slavery and racial injustice during the early 20th Century. The Mother tries to help her son maintain his faith as well, which will help him persevere through life's struggles. The mother's voice in "Mother to Son" is similar to the voice of the poet in "Dreams," who offers advice and hope for any of his readers who might be losing faith.

what does she tried to make understand to her son?