Philo Judaeus In Flaccum 12

[12] since Tiberius had frequently thought of putting Caius out of the way, as a wicked man and one who was in no respects calculated by nature for the exercise of authority, being influenced also partly by his apprehensions for his grandson; for he feared lest, when he himself was dead, his death too would be added to the funerals of his family. But Macro had constantly bade him discard these apprehensions from his mind, and had praised Caius, as a man of a simple, and honest, and sociable character; and as one who was very much attached to his cousin, so that he would willingly yield the supreme authority to him alone, and the first rank in everything.