Через тернии к звездам

It is only by endurance and suffering that glory and beatitude are obtained. See Несчастья бояться - счастья не видать (H)

Cf: Crosses are the ladders to heaven (Am.). The greater the obstacle, the more glory in overcoming it (Am.). No cross, no crown (Am., Br.). No path of flowers conducts to glory (Br.). No path of flowers leads to glory (Am.). Nothing great is easy (Br.). Through hardships to the stars (Br.)