The Role of Katekisasi Sidi in Building Faith to Form the Character of Sidi Participants at HKBP Sukadame Pematang Siantar Bangun Munthe 1 *, Imelda Butarbutar 1 , Rini Tiara Ginting 1 1 Universitas HKBP Nommensen Medan, Indonesia bangunmunthe@uhn.ac.id* ARTICLE INFO Article history: Received August 31, 2023 Revised September 15, 2023 Accepted October 20, 2023 Abstract The aim of this research is to find out the extent of the role of Sidi Catechism in building faith to shape the character of Sidi participants at HKBP Sukadame. The research population was Sidi participants at HKBP Sukadame with a total of 46 people. This research uses a descriptive method while the data analysis used in hypothesis testing is Pearson Product Moment correlation and the data collection tool is a closed questionnaire for variables Pearson Product Moment correlation statistics, and from the correlation results obtained r = 0.372 with a determination test of 13.69% and to determine whether the correlation coefficient is significant at the real level (α) = 0.05. Then a t test is carried out with the testing criterion if tcountgreater than ttable(2.67) > (1.67) at the significance level of 1-0.05 with dk = n-2 then the hypothesis is accepted. In this way, it can be stated that there is a significant relationship between the role of Sidi Catechism in building faith and forming the character of Sidi participants at HKBP Sukadame. Keywords: Role of Katekisasi Sidi, Building Faith, Building Faith Sidi Published by CV. Creative Tugu Pena ISSN 2774-4299 Website https://attractivejournal.com/index.php/bse/ This is an open access article under the CC BY SA license https://creativecommons.org/licenses/by-sa/4.0/ INTRODUCTION As time goes by, church life experiences challenge the big one. These challenges come from inside and outside the church. One of the challenges within the church is the lack of interest from the congregation in Bible teaching (accountable biblical doctrines)(Jousmäki, 2012; Krasnitskaja, 2016; Łukaszewicz, 2023; Yu & Moskal, 2019). This causes the congregation to have no sensitivity to various teachings that seem "good", "can be accepted logically", and "touch the life of the congregation", even though they actually lead to error. These teachings cannot be clearly distinguished by contemporary Christian communities. If the church does not provide the congregation with a strong foundation regarding Biblical truth, then it is certain that the resulting congregation will be a congregation that is "fragile" and "porous" in its faith which will ultimately damage the character of the congregation(Debora et al., 2021; Sianipar et al., 2020). Nowadays, the church is experiencing tough tests to be able to maintain a congregation with pure (Chalfoun, 2023; Stroope, 2011) and Biblical teaching (Brown & Cheng, 2012; Carvalho & Koyama, 2016; Cornelius et al., 2008). Clergy are challenged to participate in the competition to bring back congregations that have been lost due to the influence of the "currents" of this era. They must be brought back to Jesus Christ, the owner of their souls. This is the task entrusted by Him, Jesus Christ to His servants. Vol. 3, No. 3, September 2023 https://attractivejournal.com/index.php/bse/index Bulletin of Science Education