Plutarch. Plutarch's Lives of the Noble Grecians and Romans
Englished by Sir Thomas North. Trans. Sir Thomas North. Vol. 6 (1579; London: David Nutt, 1896) 188.

MARCUS    so followed and laboured of either partie, that one of them 
BRUTUS    put an other in sute of lawe. Brutus with his vertue and 
    good name contended against many noble exploytes in 
    armes, which Cassius had done against the Parthians. So 
    Caesar after he had heard both their objections, he told his 
    frendes with whom he consulted about this matter: Cassius 
    cause is the juster, sayd he, but Brutus must be first pre- 
The first cause    ferred. Thus Brutus had the first Praetorshippe, and Cassius 
of Cassius    the second: who thanked not Caesar so much for the Praetor- 
malice against    shippe he had, as he was angrie with him for that he had 
Caesar.    lost. But Brutus in many other thinges tasted of the 
    benefite of Caesars favour in any thing he requested. For if 
    he had listed, he might have bene one of Caesars chiefest  
    frendes, and of greatest authoritie and credit about him. 
    Howebeit Cassius frendes did disswade him from it (for 
    Cassius and he were not yet reconciled together sithence 
    their first contencion and strife for the Praetorship) and 
    prayed him to beware of Caesars sweete intisements, and 
    to flie his tyrannicall favors: the which they sayd Caesar 
    gave him, not to honor his vertue, but to weaken his 
    constant minde, framing it to the bent of his bowe. Now 
Caesar    Caesar on the other side did not trust him overmuch, nor 
suspected    was not without tales brought unto him against him: 
Brutus.    howbeit he feared his great minde, authority, and frends. 
    Yet on the other side also, he trusted his good nature, and 
    fayer condicions. For, intelligence being brought him one 
    day, that Antonius and Dolabella did conspire against him:  
    aunswered, that these fat long heared men made him not 
    affrayed, but the leane and whitely faced fellowes, meaning 
    that, by Brutus and Cassius. At an other time also when 
    one accused Brutus unto him, and bad him beware of him: 
Caesars saying    What, sayd he againe, clapping his hand on his brest: 
of Brutus.    thinke ye that Brutus will not tarie till this bodie dye? 
    Meaning that none but Brutus after him was meete to have 
    suche power as he had. And surelie, in my opinion, I am 
    perswaded that Brutus might in dede have come to have 
    bene the chiefest man of Rome, if he could have contented 
    him selfe for a time and have bene next unto Caesar, and to 
    have suffred his glorie and authoritie, which he had gotten