A good attitude is a matter of faith; disregarding your natural earthly feelings, and replacing them with a determination to embrace God’s path for us. "Attitudes are inner dispositions of the heart and thoughts — they are the hidden intentions which will eventually serve as the basis for our actions." Because attitudes are directly affected by our thoughts; If we are disciplined and filter out thoughts that are unpleasing to God, our outward attitudes and behavior will be that of Christ.
(Proverbs 23:7) "For as he thinks in his heart, so is he."
(Phillipians 2:5) "Your attitude should be the same as that of Christ Jesus."