'Duck Dynasty's Sadie Robertson Reminds Fans 'We Serve a God Bigger Than Our Insecurities' in Inspirational Post

Jul 31, 2015 02:01 PM EDT

"Duck Dynasty" star Sadie Robertson recently encouraged fans who may be going through a hard time to cast their cares on God, as He is bigger than human insecurities and has "already defeated it all on the cross."

Earlier this week, Willie and Korie's 18-year-old daughter took to Instagram to share her prayerful thoughts: "In life we get scared! We get insecure! We get worried! We get stressed! Sometimes we have anxiety! BUT we are not alone! We serve a God who is bigger than our fears, insecurities, & worries! He has already defeated it all at the cross. so trust that. Be brave & courageous because we have NOTHING to fear!" she wrote.

While the "Dancing with the Stars" alum strives to be a positive role model for her fans, she has admitted it doesn't always come easy, as she struggles with her own insecurities.

"I'm going to hit you with a reality," Sadie told fans in a seven-minute "Live Original" YouTube video earlier this year."I'm just going to be straight up honest with everything. I struggle with jealousy, and I struggle with comparing myself to other people," she revealed. "I struggle with worry, and I'm really hard on myself. I'm just like any other girl - I look in the mirror and I pick out a flaw."

Instead of focusing on the negative aspects of their bodies and working to reach superficial goals, Sadie encouraged viewers to embrace their flaws and find their worth and confidence in God.

"Don't look at somebody and say 'that's what I want to be' because in reality, if you're seeking self-approval or human approval you're never gonna reach your goal. You can only reach it by God," she stressed in the video, which has received over 2.5 million views.

In a later interview with "Good Morning America," Sadie addressed how millions of girls today feel pressured to meet society's unrealistic expectations of beauty.

"For girls, no matter who you are or what position you're in, everybody struggles with insecurities and everybody kinda compares themselves to somebody else, whether they want to admit it or not," Robertson said on "GMA."

"I just wanted people to know that no matter who you are, you can't reach it by comparing yourself to other humans," the reality star noted on the morning show. "And for me, I found that going through God was the best way that I could do it."

Earlier in July, it was revealed that Robertson will make her acting debut in "God's Not Dead 2: He's Surely Alive," which is a follow up to 2014 Christian drama "God's Not Dead" and is scheduled for released in 2016.

Sadie, Korie, and Bella Robertson will also appear in a new faith-based film that focuses on the short-but-influential life of 17-year-old Rachel Scott, who was killed in the Columbine High School massacre in 1999. The film, titled "I'm Not Ashamed," is slated for April 2016 release.