An ideal or ideals — a conceived perfect state or goal that an individual or group aspires to.
彼の理想は平和で公平な社会を作ることだ。
His ideal is to create a peaceful and fair society.
理想と現実のギャップに悩む若者も多い。
Many young people struggle with the gap between ideals and reality.
理想を追い求めるのは良いが、現実も見失ってはいけない。
It's good to pursue ideals, but you must not lose sight of reality.