Travel is fatiguing, and a wilderness has such primitive conditions for giving birth. The women grew physically tougher and endured conditions without complaint.
If we are willing to keep God’s commandments, he assures us of strength, nourishment, and success in continuing in the path of obedience. He will provide the way, and we are guaranteed success—if not immediately, then eventually. “Thus we see” what God will do if we obey.