Isaiah 44:12
The smith with the tongs both worketh in the coals, and fashioneth it with hammers, and worketh it with the strength of his arms: yea, he is hungry, and his strength faileth: he drinketh no water, and is faint. The smith with the tongs both worketh in the coals, and fashioneth it with hammers, and worketh it with the strength of his arms: yea, he is hungry, and his strength faileth: he drinketh no water, and is faint.
Isaiah 44:12 belongs in Isaiah 41-45, where God's purpose for His people is very fully revealed. Those chapters should be prayerfully studied. There God directs His people to rely on His wisdom rather than turning away from Him to look to finite man for wisdom.
Within that setting the verse belongs to a passage contrasting idols made by human hands with the true God, the Maker of heaven and earth. Specifically Isaiah 44:9-17 describes people making idols out of materials God created and then worshiping the work of their own hands instead of the Creator. The idol-makers described used gold, silver, precious stones, and wood to make images, gloried in their craftsmanship, and taught their children to treat those images as gods. The contrast teaches that people can learn from God's works to recognize the difference between their own powerless creations and their Creator.
The passage condemns the making and worship of images as senseless superstition encouraged by priests, such as carrying images of saints and pleading with them for deliverance.