One verse

Srimad Bhagavatam 10.84.19

10.84.19

ब्रह्म ते हृदयं शुक्लं तप:स्वाध्यायसंयमै: । यत्रोपलब्धं सद् व्यक्तमव्यक्तं च तत: परम् ॥ १९ ॥

brahma te hṛdayaṁ śuklaṁ tapaḥ-svādhyāya-saṁyamaiḥ yatropalabdhaṁ sad vyaktam avyaktaṁ ca tataḥ param

brahma
the Vedas
te
Your
hṛdayam
heart
śuklam
pure
tapaḥ
by austerities
svādhyāya
study
saṁyamaiḥ
and self-control
yatra
in which
upalabdham
perceived
sat
pure spiritual existence
vyaktam
the manifest (products of material creation)
avyaktam
the unmanifest (subtle causes of creation)
ca
and
tataḥ
to that
param
transcendental

The Vedas are Your spotless heart, and through them one can perceive — by means of austerity, study and self-control — the manifest, the unmanifest and the pure existence transcendental to both.