This sentence expresses a mentality of not giving up hope. As long as you don't give up and abandon, everything will be fine, and everything you want will be there.
At that time, in the play, Vasily comforted his half-starved wife before going to the countryside to collect grain. Actually, I was going to collect potatoes. The wife took the only piece of bread at home. Quietly put it in Vasily's pocket. When Vasily hugged his wife goodbye, he secretly put the bread on the table, which made people feel very moved. He firmly told his wife, "there will be bread, milk and everything."