We are prone to shrink from services that are attended with peril or loss. But when the cause of Christ and his people demand it, we must take up our cross, and follow him. When Christians are disposed to consult their own ease or safety, rather than the public good, they should be blamed. The law was express, all knew it. It is not thus in the court of the King of kings: to the footstool of his throne of grace we may always come boldly, and may be sure of an answer of peace to the prayer of faith. We are welcome, even into the holiest, through the blood of Jesus. Providence so ordered it, that, just then, the king’s affections had cooled toward Esther; her faith and courage thereby were the more tried; and God’s goodness in the favour she now found with the king, thereby shone the brighter. Haman no doubt did what he could to set the king against her. Mordecai suggests, that it was a cause which, one way or other, would certainly be carried, and which therefore she might safely venture in….  select link to read entire summary

For a more detailed explanation select the link below.

Esther 4 Bible Commentary – Matthew Henry (concise) (christianity.com)

Esther 4:16

¹⁶ “Go, gather together all the Jews who are present in Susa, and fast for me, and neither eat nor drink three days, night or day. I and my maidens will also fast the same way. Then I will go in to the king, which is against the law; and if I perish, I perish.”