語重心長

language; speech; words; to speak; to say; to talk; to tell; to express

heavy; serious; to attach importance to; to repeat; again; re-

The physical heart; the mind or intellect; feelings or emotions; the center or core of something; intention or will.

long; length; elder; chief; leader; to grow; to develop; to increase; to enhance; to be good at; surplus; spare