It is not wealth or intellect that gives happiness; it is true moral worth and a sense of duty performed. You may have the overcomer’s reward, and stand before the throne of Christ to sing His praises in the day when He assembles His saints; but your robes must be cleansed in the blood of the Lamb, and charity must cover you as a garment, and you be found spotless and without blemish.—Testimonies for the Church 4:125.
“For he that will love life and see good days, let him refrain his tongue from evil, and his lips that they speak no guile. Let him eschew evil, and do good; let him seek peace, and ensue it. For the eyes of the Lord are over the righteous, and His ears are open unto their prayers; but the face of the Lord is against them that do evil.” Those who have an experimental knowledge of this scripture are truly happy. They consider the approbation of Heaven of more worth than any earthly amusement; Christ in them the hope of glory will be health to the body and strength to the soul.—Testimonies for the Church 1:566. RRe 66
The Lord has made every provision for our happiness in the future life, but He has made no revelations regarding these plans, and we are not to speculate concerning them. Neither are we to measure the conditions of the future life by the conditions of this life. Hvn 62
Rejoice in the Lord, ye righteous; and give thanks at the remembrance of His holiness. Psalm 97:12. KJV