What to Do in Case of Disagreement?

Due to the multiplicity of scholars’ opinions in Fiqh, I have to ask: where does a Muslim stand concerning the disagreement of opinions between scholars, which is apparent in their Fatwas?

A Muslim must seek to follow the preponderant position, which brings about benefit and wards off evil from the Muslims, and be supported by proofs at the same time. This matter requires great knowledge and understanding. If one is not knowledgeable enough, he has to follow the more knowledgeable scholars who are known for their piety, righteousness, and uprightness, and who do not give Fatwas hastily. When a scholar possessing these qualities gives a Fatwa to any Muslim, he should follow it and there will be no harm on him.