Adam Clarke on Ezekiel 24:16

Behold, I take away from thee the desire of thine eyes - Here is an intimation that the stroke he was to suffer was to be above all grief; that it would be so great as to prevent the relief of tears.

Curae leves loquuntur, graviores silent, is a well-accredited maxim in such cases. Superficial griefs affect the more easily moved passions; great ones affect the soul itself, in its powers of reasoning, reflecting, comparing, recollecting, etc., when the sufferer feels all the weight of wo.

Neither shall thy tears run down - Τουτο γαρ ιδιον των οφθαλμων εν τοις μεγαλοις κακοις· εν μεν γαρ ταις μετριαις συμφοραις αφθονως τα δακρυα καταρῥει, - εν δε τοις ὑπερβαλλουσι δεινοις φευγει και τα δακρυα και προδιδωσι και τους αφθαλμους· Achill. Tat. lib. 3. c. 11. For this is the case with the eyes in great calamities: in light misfortunes tears flow freely, but in heavy afflictions tears fly away, and betray the eyes.