Truth will always triumph; do not doubt that in the least. There are two eight-lettered axioms in the Gita which support the Vedic dictum:

सत्यमेव जयते नानृतं सत्येन पन्था विततो देवयानः ।

येनाक्रमन्त्यृषयो ह्याप्तकामा यत्र तत् सत्यस्य परमं निधानम् ॥

Satyam eva jayate na nrutam (Truth only wins, not falsehood):

Mundaka Upanishad (3.1.6),

They are,

ajnas casraddadhanas ca

samsayatma vinasyati

nayam loko sti na paro

na sukham samsayatmanah

(4:40)

sraddhaval labhate jnanam

tat-parah samyatendriyah

jnanam labdhva param santim

acirenadhigacchati

(4:39)

samsayatma vinasyati (He who doubts is destroyed), and Shraddavan labhate Jnanam (Steady faith wins true wisdom) (Bhagavad Gita, 4:39,40). If people are slaves of doubt, how can they save themselves? (SSS Vol.16, p. 7)