Prophets and apostles knew hidden things by revelation for their office; it does not follow the dead see all
Anyone who sifts the proofs they bring from Scripture to establish so great a matter will easily see how weak and light they are.
First, they prove that the saints reigning with Christ in heaven know what happens on earth, and so hear the prayers of all who call on them and see into their thoughts and hearts, from the fact that some men while still alive knew things absent and future, and even the secrets of the heart. Elisha, for example, said to his servant Gehazi, "Did not my heart go with you when the man came down from his chariot to meet you?" (2 Kings 5:26). Samuel said to Saul, "I will tell you all that is in your heart," and spoke of his father's asses that he had lost (1 Samuel 9:19-20). Peter knew, though he was not present, that Ananias and Sapphira had kept back part of the price of the field (Acts 5:1-9). Paul looked into the heart of the lame beggar and saw that he had faith to be healed (Acts 14:9).
But what sort of inference is this: prophets and apostles knew certain hidden things that belonged to their office, because God revealed them; therefore the souls of the blessed, received into heavenly glory, know what happens on earth, see the needs of all who call on them, and hear their prayers, whether spoken aloud or formed only in the heart's desire? What does follow is that God can reveal to the blessed spirits of the just whatever needs, actions and thoughts of men living here he pleases. Whether he does so cannot be concluded from it at all.
Latin
XCVIII. Quam autem infirma atque levia sint quae ad tantae rei fidem faciendam ex Scriptura proferunt, excutienti facile apparebit. Primum igitur Sanctos in caelis cum Christo regnantes nosse quae in terris geruntur, ac proinde percipere preces omnium qui illos invocant, & eorum cogitationes ac corda intueri, ex eo probant quod nonnulli viventes absentia & futura; adeoque cordis occulta non ignorarunt. Ut, exempli causa, Helisaeus, qui dicebat servo suo Giezi, Nonne Cor meum in praesenti erat, quando descendit homo de curru suo in occursum tuum? Et Samuel qui Sauli inquiebat, Omnia quae sunt in corde tuo dicam tibi; & de asinis Patris tui, quos perdidisti. Et sic Petrus absens sciebat Ananiam & Sapphiram fraudasse de pretio agri. Et Paulus intuitus cor claudi mendici, cognovit eum fidem habere, ut salvus fieret. Sed cujusmodi est ista consequentia, Prophetae atque Apostoli occulta quaedam, quae ad munus ipsorum pertinebant, Deo revelante, noverunt: ergo Beatorum animae, in gloriam caelestem receptae, norunt ea quae in terris geruntur, ac omnium qui eos invocant necessitates vident, ac preces percipiunt, sive ore, sive solo corde & affectu conceptas? Inde quidem sequitur Deum posse quas libuerit hominum hic viventium necessitates, actiones, & cogitationes Beatis Spiritibus justorum revelare; sed an istud faciat, vel non, inde concludi nullo modo potest. 2. Reg. 5. 1 Sam. 9. Act. 5. Act. 14.