And while they looked stedfastly toward heaven as he went up, behold, two men stood by them in white apparel; Looked steadfastly - Keeping their eyes intensely fixed on their ascending Lord; continuing to look even after he had ascended above the region of the inferior clouds.
Two men stood by them - Doubtless, angels in human shape.
In white apparel - As emblematical of their purity, happiness, and glory.